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Malicious package

wbotfossil999RubyGems

Advisory published Updated

wbotfossil999 is a confirmed malicious RubyGems package (MAL-2026-9315) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in wbotfossil999 (RubyGems)

MAL-2026-9315
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall wbotfossil999

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

87bb578b914d0232516028dc6cd042d69c94de5ff9840068a7b5c0e73fc9747b
7adab6fb9b621e57f1c388169078451c81fad3c265cf3cba8a21bd19bab3bb76

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for wbotfossil999 (version 0.0.1).

  2. If you installed it — respond

    Remove wbotfossil999 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If wbotfossil999 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. wbotfossil999 on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-03966RLUA-2026-09896

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks wbotfossil999-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

wbotfossil999 (RubyGems) malicious package — MAL-2026-9315 | O3 Security